Randomized generation of text, subject to syntactic constraints, has
potentially broad applications, including (but certainly not limited to) the
generation of input test cases for various types of software. Various
programs supporting syntactically-rich input, in particular, may benefit
from testing with automatically-generated inputs that obey
context-free syntactic constraints but which are otherwise randomized.
examples page provides an illustration
in which an m4r script is used to test a
subset of the input language supported by the
bench calculator program.